A Jon Snow sequel is officially in the works, and this spinoff series could very well feel like Game of Thrones season 9 in everything but name. When Game of Thrones concluded in 2019, HBO had already made it clear that there were plans to further explore the world of Westeros.
At that time, however, the expectation was that the spinoffs would be entirely new stories, with little to no direct connection to Game of Thrones. While prequels seemed likely, sequels appeared unlikely.